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  <h3>隧道坡度比例系数计算公式：</h3>
  <div class="formula">\( K_s = \frac{H}{L} \)</div>

  <h3>火源位置比例系数计算公式：</h3>
  <div class="formula">\( K_x = \frac{x}{L} \)</div>

  <h3>火源面积比例系数计算公式：</h3>
  <div class="formula">\( K_A = \frac{A}{A_0} \)</div>

  <h3>隧道水力直径计算公式：</h3>
  <div class="formula">\( D_h = \frac{4A}{P} \)</div>

  <h3>无量纲热释放速率计算公式：</h3>
  <div class="formula">\( Q^* = \frac{Q}{\rho c_p T_0 \sqrt{g} D^{5/2}} \)</div>

  <h3>无量纲临界风速计算公式：</h3>
  <div class="formula">\( u_c^* = \left( \frac{Q}{\rho c_p T_0} \right)^{1/3} \cdot D^{-2/3} \)</div>

  <h3>临界风速计算公式：</h3>
  <div class="formula">\( u_c = u_c^* \cdot \left( \frac{Q}{\rho c_p T_0} \right)^{1/3} \cdot D^{-2/3} \)</div>
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